Steam-boiler



(No Model.) 2 Sheets-Sheet 1.

H. WEITZEL.

STEAM BOILER.

No..373,954. Patented Nov. 29-. 1887;

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(No Model.) 2 Sh eets-Sheet 2.

H. WEITZEL.

STEAM BOILER.

No. 373,954. I Patented Nov. 29, 188 7.

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UNITED STATES.

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HENRY \VEITZEL, OF MINNEAPOLIS, MINNESOTA.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 373.95%. dated November29. 1887.

Application filed June 28, 1887. Serial No. 242,715. (No model.)

To all whom it may concern.-

Be it known that I, HENRY VVEITZEL, of Minneapolis, in the county ofHennepin and State of Minnesota, have invented certain new and usefulImprovements in Steam-Boilers, of which the following is aspecification.

My invention relates to improvements in steam-boilers; and the object Ihave in view is to utilize a certain portion of the heat of the furnacewhich in the ordinary construction ofboiler is wasted.

My invention consists, generally, in the construction and combinationhereinafter described, and particularly pointed out in the claim.

In the drawings which form a part of this specification, Figure 1 isaside elevation of a boiler with the outer wall of the setting removed,showing the manner in which my invention is applied. Fig. 2 is across-section taken on line a: :r' of Fig. 1. Fig. 3 is a plan view ofthe boiler.

In the drawings, 2represents a boiler, which is preferably of theordinary construction of return-flue boilers, being provided with thefire-front 4, the furnace 6, grates 7, and combustion-chamber 8, allarranged in 'the usual manner.

10 are pipes or tubes, which lie horizontally on either side of thefurnace and within the walls 12, which form the setting. These pipes areexposed to the fire in the furnace, and are preferably located so thatthe bottom of the pipe shall be horizontally about on a line with thetop of the grate. These pipes are preferably arranged to extend throughthe firefront 4, and are provided with caps 14, which may be removed, ifdesired, and thus furnish a means of cleaning the said pipes.

16 are other pipes or tubes which lie parallel to the pipes 10, butpreferably on a plane above the top of the boiler. The pipes 16 may beof smaller diameter than the pipes 10, and are connected across at theback by a branch pipe, 18, which is furnished with a T-fitting, 20, anda short pipe, 21, by which it is connected to thesteam-space of theboiler. The pipes 10 and 16 are connected together by means of a seriesof pipes, 22. These pipes are placed as near together as practicable andextend vertically along the inner walls of the furnace. They arepreferably provided at their upper extremity with a T-fitting. 24, andare connected to the pipe 16 by the short horizontal pipe 26. Aplug, 28,is placed in the opening of the T, opposite the inlet of the pipe 22,and by removing this plug free access is obtained to the said pipeshould it become necessary to clean it, and by the arrangement of thehorizontal pipe 26 any one of the pipes in the series is allowed toexpand independently of the others, and thus prevent the liability ofleaking joints.

I prefer to attach one of the pipes of the series on each side to thewaterspace ofthe boiler, and to do this as near to the front end of theboiler as possible to obtain the water at a point where it is leastliable to sediment. This may be done in the manner shown, where the second pipe, 29, in the series is connected directly to the shell of theboiler below the water-line by means of a T-fitting similar to the onealready described and the horizontal pipe 30. It will be seen that bythis arrangement the entire side walls of the furnace may be lined withwater-pipes, which are kept filled by the water from the boiler passingdown the pipes 29, which communicate with the other pipes in the seriesthrough the pipes 10, and thus maintaining the level of the water in thepipes substantially the same as the water in the boiler. The heat in thefurnace which is or dinarily carried off by the side walls and wastedwill be utilized by these pipes. The steam generated in them will passto the pipe 16 and by it be delivered to the boiler.

I do not confine myself to the arrangement of pipes as shown, as thisconstruction may be varied without-departing from my invention.

The advantages of my invention are that by connecting the pipes 22 attheir lower extremities I am enabled to secure a thorough circulation ofwater in said pipes, and by extending the pipes 10 and 16 through thefire-front I provide a ready means of cleaning said pipe, which is ofgreat importance, for if the pipes are exposed to the fire in this waywithout being connected to both the steam and water space of the boiler,and without a means of cleaning, they soon become choked and willburnout. In my arrangement, by removing the caps 14 and cleaning plugs28, I am enabled to readily clean the whole series.

I claim as my invention- The combination, with the boiler 2 and thefurnace (5, of the horizontal tubes 10 and 16, the upper tube, 16,having an outlet to the steam-space of the boiler, the vertical tubes22, located along the inner surface of the firebox and exposed to theflame and joined to the lower tubes, 10, the couplings 24, having thescrew-plngs 28 on the upper ends of the said tubes 22, the tubes 26,joined to said couplings and to the tube 16, and the vertical pipe 29,1o connecting the tube 10 with the water-space of the boiler,substantially as described.

In testimony whereof I have hereunto set my hand this 6th day of June,1887.

HENRY \VEITZEL. In presence of R. H. SANFORD, A. M. GASKILL.

